Summertime and the drivin’ is easy? Daylight saving time and vehicle accidents
利用希腊2006-2016年每日车辆事故数据，通过断点回归发现夏令时转换通过改变日照时长影响事故数量：春季转换减少严重事故，秋季转换增加轻微事故，为欧盟废除夏令时辩论提供实证依据。
We investigate how exogenous variation in daylight caused by Daylight Saving Time affects road safety as measured by the count of vehicle crashes. We use administrative daily data from Greece covering the universe of all types of recorded vehicle accidents during the 2006-2016 period. Our regression discontinuity estimates support an ambient light mechanism that reduces the counts of serious vehicle accidents during the Spring transition and increases the count of minor ones during the Fall transition. The effects are driven from the hour intervals that are mostly affected from seasonal clock changes. We then discuss the potential cost implications of those seasonal transitions. In light of the talks about abolishing seasonal clock changes in the European Union (EU), our findings are policy relevant and can inform the public debate as empirical evidence for the block is scarce.